/*
 * Copyright 2002-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
package org.springframework.cglib.transform.impl;
 
import org.springframework.cglib.core.ClassGenerator;
import org.springframework.cglib.core.DefaultGeneratorStrategy;
import org.springframework.cglib.core.TypeUtils;
import org.springframework.cglib.transform.ClassTransformer;
import org.springframework.cglib.transform.MethodFilter;
import org.springframework.cglib.transform.MethodFilterTransformer;
import org.springframework.cglib.transform.TransformingClassGenerator;
 
/**
 * Memory safe variant of {@link UndeclaredThrowableStrategy} ported from the latest
 * as yet unreleased cglib code.
 */
public class MemorySafeUndeclaredThrowableStrategy extends DefaultGeneratorStrategy {
 
        private static final MethodFilter TRANSFORM_FILTER = new MethodFilter() {
                public boolean accept(int access, String name, String desc, String signature,
                                String[] exceptions) {
                        return !TypeUtils.isPrivate(access) && name.indexOf('$') < 0;
                }
        };
 
 
        private Class wrapper;
 
 
        public MemorySafeUndeclaredThrowableStrategy(Class wrapper) {
                this.wrapper = wrapper;
        }
 
 
        protected ClassGenerator transform(ClassGenerator cg) throws Exception {
                ClassTransformer tr = new UndeclaredThrowableTransformer(wrapper);
                tr = new MethodFilterTransformer(TRANSFORM_FILTER, tr);
                return new TransformingClassGenerator(cg, tr);
        }
}